.banner{
    max-width: 1210px;
    width: 100%;;
    height: 400px;
    position: relative;
    margin: 0 auto;
    /*border: 20px solid #fff;*/
    /*box-shadow: 1px 1px 3px rgba(0,0,0,.1);*/
    margin-bottom: 20px;
}
.img{
    width: 100%;
    height: 400px;
    position: absolute;
    left: 0;
    top: 0;
    z-index: 1;
    background-repeat: no-repeat;
    background-position: 0 0;
}
.img div{
    width: 33.3%;
    height: 100%;
    position: relative;
    float: left;
    overflow: hidden;
    background-repeat: no-repeat;
}
.img div span{
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0px;
    left: -100%;
    z-index: 2;
    text-indent: -9000px;
}
.img div span:nth-child(1){
    background-image: url('../images/qnh_index_banner_01.jpg');
}
.img div span:nth-child(2){
    background-image: url('../images/qnh_index_banner_02.jpg');
}
.img div span:nth-child(3){
    background-image: url('../images/qnh_index_banner_03.jpg');
}
.img div:nth-child(1) span{
    background-position: 0 0;
}
.img div:nth-child(2) span{
    background-position: 50% 0;
}
.img div:nth-child(3) span{
    background-position: -50% 0;
}
.active{
    animation: change 0.6s ease-in-out;
}
@keyframes change{
    0%{
        left: 0;
    }
    100%{
        left: 100%;
    }
}
.img div .clear{
    transition: left 0.5s ease-in-out;
    animation:none;
    left: 0px;
    z-index: 10;
}
/* .img div .reset{
    left: 0px;
} */
.dot{
    position: absolute;
    width: 50%;
    left: 50%;
    bottom: -0px;
    margin-left: -25%;
    background: #FFF;
    height: 10px;
    z-index: 22;
    display: flex;
    justify-content: space-around;
}
em{
    list-style: none;
    display: block;
    width: 33.3%;
}
.active{
    background: rgb(225,71,47);
}
.step{
    position: absolute;
    left: 0;
    top: 0;
    height: 10px;
    width: 100%;
    background: rgb(57,57,57);
    z-index: 1000;
    opacity: 0;
}
.arrow{
    position: absolute;
    width: 40px;
    height: 40px;
    text-align: center;
    line-height: 40px;
    background: rgb(57,57,57);
    color: #fff;
    z-index: 6;
    font-size: 36px;
}
.lfArrow:hover{
    background:rgb(225,71,47) url('../images/qnh-left-arrow.png') no-Repeat 0 0;
}
.riArrow:hover{
    background:rgb(225,71,47) url('../images/qnh-right-arrow.png') no-Repeat 0 0;
}
.lfArrow{
    left: 0;
    top: 50%;
    margin-top: -20px;
    background:rgb(57,57,57) url('../images/qnh-left-arrow.png') no-Repeat 0 0
}
.riArrow{
    right: 0;
    top: 50%;
    margin-top: -20px;
    background:rgb(57,57,57) url('../images/qnh-right-arrow.png') no-Repeat 0 0
}

